Table of Contents
What describes the way a convection current moves?
Convection currents describe the rising, spread, and sinking of gas, liquid, or molten material caused by the application of heat. Tremendous heat and pressure within the earth cause the hot magma to flow in convection currents. These currents cause the movement of the tectonic plates that make up the earth’s crust.
What is the movement in convection?
Convection is the transfer of heat by the movement of a fluid (liquid or gas) between areas of different temperature.
Which way does convection move?
Water, like air, is a fluid that can carry heat as it moves from one place to another. Meteorologists have different terms for horizontal and vertical movement of fluids: movement in the vertical direction driven by buoyancy is called convection, and movement in the horizontal direction is called advection.
What describes convection process?
Convection, process by which heat is transferred by movement of a heated fluid such as air or water. Forced convection involves the transport of fluid by methods other than that resulting from variation of density with temperature. Movement of air by a fan or of water by a pump are examples of forced convection.
What creates a convection current?
Convection currents are the result of differential heating. Lighter (less dense), warm material rises while heavier (more dense) cool material sinks. It is this movement that creates circulation patterns known as convection currents in the atmosphere, in water, and in the mantle of Earth.
Can convection currents change direction?
Convection currents observed in water rise to the surface and then spread out in both direction. Convection currents in the mantle are thought to operate in the same matter as convection currents in water. This shows that the convections currents move outward both right and left after the current reaches the surface.
How can you reduce convection?
To reduce the presence or frequency of window convection in your home, there are some things you can do. Leave your blinds or curtain slightly open to encourage warm air reach the glass. Promote a warmer glass surface and that cycle will not be as pronounced.
How does convection work in a fridge?
Refrigerators operate using convection by circulating the gas through the copper lines inside of the refrigerator or freezer compartment. The lines, and the gas contained within them, absorb the heat contained in the refrigerator and freezer compartments, and are circulated back outside of the unit.
How does convection heat the House?
Convection heat warms a room from the top down; it uses the natural movement of air which rises when warm, drops as it cools and so on. Convection heaters warm the air as it passes over a heated coil; some use a fan to draw in the cool air to heat. The heated air rises naturally or is forced out by a fan and spreads into the space to warm it.
How does convection heat a room?
Convection heaters are indirect heaters, they heat the air that circulates through the target area. Air convection currents are drawn through the heating elements, usually by a fan. The air heats up and circulates throughout the room, raising the temperature of the entire room.